When creating content you'll often want to add links to other pages on your website, a landing page or contact form, or out to a 3rd party website.
In addition to adding buttons to some elements, you can add links inline.
Click on the Toolbar for the element
Highlight the text you'd like to link out
Click the link icon in the text editor
Add the destination - you can use absolute links (including http:// for external sites) or relative links (/pageurl) for pages on your own site.